udp_protocol.h

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/*******************************************************************************
 * Copyright (c) 2018, Rockwell Automation, Inc.
 * All rights reserved.
 *
 ******************************************************************************/

#ifndef SRC_PORTS_UDP_PROTOCOL_H_
#define SRC_PORTS_UDP_PROTOCOL_H_

#include <stdint.h>
#include <stddef.h>
#ifdef OPENER_POSIX
#include <netinet/in.h>
#elif WIN32
typedef uint32_t in_addr_t;
#endif

static size_t kUpdHeaderLength = 8U; 
typedef struct {
    uint16_t source_port; 
    uint16_t destination_port; 
    uint16_t packet_length; 
    uint16_t checksum; 
} UDPHeader;

void UDPHeaderSetSourcePort(UDPHeader *const header, const uint16_t source_port);

uint16_t UDPHeaderGetSourcePort(const UDPHeader *const header);

void UDPHeaderSetDestinationPort(UDPHeader *const header, const uint16_t destination_port);

uint16_t UDPHeaderGetDestinationPort(const UDPHeader *const header);

void UDPHeaderSetPacketLength(UDPHeader *const header, const uint16_t packet_length);

uint16_t UDPHeaderGetPacketLength(const UDPHeader *const header);

void UDPHeaderSetChecksum(UDPHeader *const header, const uint16_t checksum);

uint16_t UDPHeaderGetChecksum(const UDPHeader *const header);

uint16_t UDPHeaderCalculateChecksum(const void *udp_packet, const size_t udp_packet_length, const in_addr_t source_addr, const in_addr_t destination_addr);

void UDPHeaderGenerate(const UDPHeader *header, char* message);

#endif /* SRC_PORTS_UDP_PROTOCOL_H_ */